Asalam alaikum. Is it haram to buy and drink non-alcoholic natural malt drink and which is made by a company that makes and sales alcoholic drink such as bear and wine. Thank you

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.

If the drink is alcohol-free, then it is permissible to buy it from the company which produces and sells other alcoholic drinks. The evidence about this is that the Muslims used to trade with the people of the book despite knowing that they sell unlawful food and drinks and deal with Riba (interest and/or usury) in their trade.

For more benefit, please refer to Fataawa 81498 and 87498. 

Allaah Knows best.